there are a few "hunting stands" out in western MN that are tricked out as anything you could imagine. While I haven't seen one with a hot tub. (yet) I have addressed one faced with verona marble, full kitchen, 200 amp electric service, septic system, and a dumbwaiter.
I wouldn't classify it a hunting lodge as it does have a garage, but no sleeping quarters.
Place looks really cool. it's basically an A-frame with a bell tower. The structure alone is valued at $175,000